Medical waste containers and lids therefore

ABSTRACT

Waste container lid assemblies configured for attachment to a base having a lid body and cap portion slidably connected by a tether. The lid body having an opening sized to accept medical waste and restrict access to prevent individuals from reaching into the waste container through the opening. A slot is in the lid body to permit slidable movement of the tether through the slot such the cap can be moved from a resting position in which the opening is configured for receiving waste to a closed position such that the cap portion covers the opening.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional of U.S. patent application No.13/250,501, filed Sep. 30, 2011, now U.S. Pat. No. 9,320,567, issuedApr. 26, 2016, the entire disclosure of which is hereby incorporated byreference herein.

BACKGROUND

The present invention relates to medical waste disposal containers andlids for such containers, particularly containers for used sharp medicaldevices, which may require temporary and permanent closure.

The safe and efficient disposal of sharp medical devices such assurgical knives, blades, hypodermic needles and the like is a problemfor medical and other healthcare facilities. Disposable containers havebeen developed in recent years which provide a reasonably high degree ofsecurity for disposable sharps articles and materials from hospitals andclinics. Many of these articles, such as needles and surgical bladesknown as sharps, and other similar articles and materials, must bedisposed of in a manner to keep them out of the hands of unauthorizedpersons and to keep them from being reused.

The containers are normally designed to prevent the removal of materialsfrom the container under ordinary circumstances until permanentlyclosed. Commonly used Horizontal Entry Opening containers, whichaccommodate a counter-balance door restrict human access to the contentsof the container by creating a torturous path when a person attempts toput their hand into the container. Unfortunately, this same restrictedaccess can prohibit the disposal of certain objects through the opening.Any object disposed of must impact the counter-balanced door and theweight of the disposed item will rotate the door moving it out of theopening and allowing the item to drop into the container. This createsan opportunity for very light, unusually shaped or sticky items tobecome hung up on the door warranting additional manipulation from theuser to finish the disposal of the item increasing the risk of danger tothe user from contamination or needle sticks.

Accordingly, there is an ongoing need in the art for containers whichrestricts human access to the contents and provides an opening ofsufficient size to allow disposal of large or oddly shaped items.

SUMMARY OF THE INVENTION

One or more embodiments are directed to waste containers comprising abase and a lid assembly. The base has a bottom wall, a side wallextending upwardly from the bottom wall and defining a receptacle forreceiving medical waste. The lid assembly includes a lid body configuredfor assembly to the base and a cap portion. The cap portion is connectedto the lid body and covers an opening in the lid body. The opening beingsized to accept medical waste and restrict access to prevent individualsfrom reaching into the waste container through the opening. A tetherslidably connects the cap portion to the lid body. A slot is in the lidbody to permit slidable movement of the tether through the slot such thecap can be moved from a resting position such that the opening isconfigured for receiving waste to a closed position such that the capportion covers the opening. In some embodiments, the cap portion andtether are integrally formed. In specific embodiments, the lid assemblyis made of a thermoplastic material.

In some embodiments, the opening is located in a forward portion of thelid body and the slot is located in a rearward portion of the lid body.The tether engages the slot such that the cap portion is permitted tomove forwardly and rearwardly. In detailed embodiments, the lid bodyincludes a raised surface extending from an upper surface of the lidbody that engages the cap portion when the cap portion is in the restingposition. In specific embodiments, the cap portion includes a recessconfigured to engage the raised surface. In detailed embodiments, theforward portion and the rearward portion are tilted relative to eachother.

In some embodiments, the slot is located adjacent the raised surface. Indetailed embodiments, the slot is located within the raised surface. Inspecific embodiments, the raised surface defines a notched area, and theslot is located within the notched area.

In one or more embodiments, the opening is surrounded by a raisedperipheral lip extending from an upper surface of the lid body, and thecap portion includes a peripheral channel to engage the raisedperipheral lip. In detailed embodiments, the cap portion includes atleast a pair of locking tabs and lid body includes at least a pair ofslits positioned to accept the locking tabs to lock the cap portion in aclosed position. In specific embodiments, the locking tabs includeradially projecting fins sized to provide an interference fit whensliding through the slits into the closed position and prevent removalof the cap portion from the lid body.

Additional embodiments of the invention are directed to waste containerlid assemblies including a lid body configured for assembly to acontainer base. The waste container lid assembly comprises a cap portionconnecting to the lid body that covers an opening in the lid body, theopening located in a forward portion of the lid body and sized to acceptmedical waste and restrict access to prevent individuals from reachinginto the waste container through the opening. A tether engages the slotand slidably connecting the cap portion to the lid body, permitting thecap portion to move forwardly and rearwardly. A slot located in arearward portion of the lid body to permit slidable movement of thetether through the slot such the cap can be moved from a restingposition such that the opening is configured for receiving waste to aclosed position such that the cap portion covers the opening.

In some embodiments, the lid body includes a raised surface extendingfrom an upper surface of the lid body that engages the cap portion whenthe cap portion is in the resting position. In detailed embodiments, thecap portion includes a recess configured to engage the raised surface.In specific embodiments, the raised surface defines a notched area, andthe slot is located within the notched area.

In some embodiments, the opening is surrounded by a raised peripherallip extending from an upper surface of the lid body, and the cap portionincludes a peripheral channel to engage the raised peripheral lip. Indetailed embodiments, the cap portion includes at least a pair oflocking tabs and lid body includes at least a pair of slits positionedto accept the locking tabs to lock the cap portion in a closed position.In specific embodiments, the locking tabs include radially projectingfins sized to provide an interference fit when sliding through the slitsinto the closed position and prevent removal of the cap portion from thelid body.

The various embodiments and aspects of the invention described here canbe employed individually or in conjunction.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a top front perspective view of a medical waste container witha lid assembly according to one or more embodiments in which the capportion is in the open resting position;

FIG. 2 is a top rear perspective view of a medical waste container lidassembly according to one or more embodiments with the cap portion inthe open resting position;

FIG. 3 is a top front perspective view of a waste container lid assemblywith the cap portion in the closed position;

FIG. 4 is a bottom front perspective view of a cap portion of a lidassembly in accordance with one or more embodiments of the invention;and

FIG. 5 is a top rear perspective view of a cap portion of a lid assemblyin accordance with one or more embodiments of the invention.

DETAILED DESCRIPTION

Before describing several exemplary embodiments of the invention, it isto be understood that the invention is not limited to the details ofconstruction or process steps set forth in the following description.The invention is capable of other embodiments and of being practiced orbeing carried out in various ways.

Embodiments of the invention are directed to medical waste containertops and closures with a redesigned access opening which fits existingsharps collector bases for a patient room sharps collector. The closureof various embodiments is retained to the top via a tether near, but notover, the opening allowing unobstructed access to the opening duringuse. The top, with closure, may be snapped onto a base which is thenplaced into a patient room wall mounted cabinet or bracket. The openingis accessible for one handed disposal of sharps and medical waste duringnormal use. After the collector is full, the closure is snapped andlocked over the opening for disposal.

Embodiments of the invention are intended for vertical disposal ofsharps waste as opposed to horizontal disposal. For example, a syringecan be disposed of by dropping the syringe (e.g., point first) into thecollector as opposed to a horizontal orientation as in alternatedesigns. The smaller open vertical entry design restricts human accessto the contents by having a reduced opening size large enough fordisposal of sharps and medical waste, but small enough to prohibit theinsertion of hands.

The straight through design of the vertical entry opening allows for thefree fall disposal of items when disposed of into the container. Itemssuch as blood collection units with tubing attached can be fed into theopening and dropped without the need for additional manipulation fromthe user. By eliminating the horizontal entry counter-balanced door andutilizing the straight through vertical entry, there is nothing presentwhich may impede disposal of certain items. Many users have higherdisposal rates of unusually shaped devices and need to be able todispose of the items in a consistent and safe manner.

The present invention pertains to a waste container lid and wastecontainers including such lids. FIGS. 1-5 show an exemplary embodiment awaste container lid assembly 100. The lid assembly 100 is configured forassembly to a base 200. The base 200 includes a bottom wall 202, atleast one side wall 204 extending upwardly from the bottom wall 202. Theat least one side wall 204 and the bottom wall 202 forming and defininga receptacle suitable for receiving medical waste. The bottom wall 202and at least one side wall 204 of the base 200 can be integrally formedso that the base appears to be an integrally formed single unit. Anysuitable base 200 can be employed and it should be understood that theinvention is not limited to any particular style or material.

The lid assembly 100 is composed of two main parts, a lid body 110 and acap portion 140. The cap portion 140 is connected to the lid body 110and, in one position, covers an opening 112 in the lid body 110. Theopening 112 is sized to accept medical waste and restrict access toprevent individuals from reaching into the waste container through theopening 112. The opening 112 can be any suitable size or shape. Forexample, the opening 112 shown in the Figures is oval shaped. In variousembodiments, the opening 112 is round, oval, square, rectangular,oblong, trapezoidal, rhomboid, rectangular with rounded corners. Itshould be understood that these shapes are merely illustrative ofpossible openings and that other shapes may be employed.

The lid body 110 and the cap portion 140 are connected by a tether 150.The tether 150 can be integrally formed with the cap portion 140, asshown in FIGS. 4 and 5, or can be separate components with a suitableconnection. The tether 150 slidably connects the cap portion 150 to thelid body 110 via a slot 114 in the lid body 110. The tether is sized toallow the cap to slide between the open or resting position in FIG. 1and the closed position in FIG. 3. The slot permits slidable movement ofthe tether 150 through the slot such that the cap portion 140 can bemoved from a resting position 116 to a closed position 118. As shown inFIGS. 4 and 5, the tether 150 may include a barb 152 suitable forpreventing the cap portion 140 from becoming disconnected from the lidbody 110. The barb 152 of some embodiments has a tapered shape with anarrow end 154 flaring to a wide portion 156. The wide portion 156 beingsized slightly larger than the slot 114. This enables the tether to beinserted through the slot 114 from the narrow end 154 and prevents thetether 150 from being completely removed from the slot 114 byinteraction of the wide portion 156 with the slot 114. This barb 152 mayalso be referred to as a bayonet style locking tab.

In the resting position 116 (see FIG. 1), the cap portion 140 ispositioned such that the opening 112 is configured for received waste.In some embodiments, when the cap portion 140 is positioned in theresting position 116, the opening 112 is unobstructed by the cap portion140. In the closed position 118, the cap portion 140 covers the opening112. In detailed embodiments, in the closed position 118, the capportion 140 covers the opening 112 and substantially completelyobstructs the opening and permanently closes the lid assembly,preventing access to the contents of the base 200. As used in thisspecification and the appended claims, “permanently closing” refers to acondition in which the contents of the container cannot be accessedthrough the opening without using either a tool specifically designed toremove the cap portion 140 from the opening 112 or requiring thesubstantial destruction of at least a portion of the lid assembly. Inother words, permanently closing is intended to lock the container toprevent unauthorized access of the container after it has been locked bya medical practitioner and the container is ready for disposal.

In some embodiments, the opening 112 is located in a forward portion 120of the lid body 110 and the slot 114 is located in a rearward portion122 of the lid body 110. Stated differently, the opening 112 is a holethrough the major plane of the forward portion 120 and the slot is anelongate hole in the major plane of the rearward portion 122 of the lidbody 110. The tether 150 engages the slot 114 such that the cap portion140 is permitted to move forwardly and rearwardly along path 113. Indetailed embodiments, moving the cap portion 140 from the restingposition 116 to the closed position 118 requires substantially onlyforward movement. As used in this specification and the appended claims,the term “substantially only forward movement” means that little or noside to side movement of the cap portion 140 is required to move fromthe resting position 116 to the closed position 118, or to move from therearward portion 122 to the forward portion 120.

The forward portion 120 and the rearward portion 122 can besubstantially coplanar, meaning that the front and back areapproximately flat, or tilted relative to each other. FIG. 1, shows anembodiment where the forward portion 120 is substantially flat so thatit is substantially horizontal with the rearward portion angled back,away from the forward portion 120. This configuration may be useful inboth presenting the opening in an upright state to the user and inhelping keep the cap portion 140 from being accidentally pulled over theopening 112. In other embodiments, the forward portion 120 is tiltedforward, toward the user, and the rearward portion 122 is eitherapproximately level or tilted slightly backward.

In some embodiments, the lid body 110 includes a raised surface 124extending from an upper surface 126 of the lid body 110. Stateddifferently, the raised surface 124 is a portion that extends above themajor plane of the lid body 110. In some embodiments, the raised surface124 extends above the major plane of the rearward portion 122 of the lidbody 110. The raised surface 124 can engage the cap portion 140 when thecap portion 140 is in the resting position 116. In detailed embodiments,as shown in FIG. 3, the cap portion 140 includes a recess 142 configuredto engage the raised surface 124. This engagement can be of acooperative nature such that there is little or no force required todisengage the cap portion 140 from the raised surface 124, or can have afriction fit so that the cap portion 140 does not become inadvertentlydislodged from the raised surface 124.

In the detailed embodiments shown in FIGS. 2 and 3, the cap portion 140rests on the raised surface 124 which has a rectangular horseshoeconfiguration including a channel 130. With the raised surface 124located in the rearward portion 122 of the lid body 110, the cap portion140, when in the resting position 116 is located adjacent the rearwardportion 122. The rectangular horseshoe configuration defines the notchedarea 128 and the channel guides the movement of the tether 150. Indetailed embodiment, the notched area 128 is in the major plane of therearward portion 122 of the lid body 110. When in the resting position116, the cap portion 140 can rest over the raised surface 124 so thatthe waste can be disposed within the container through the opening 112.The cap portion 140 may include a rectangular recess 142 configured tocooperatively interact with the rectangular horseshoe configuration ofthe raised surface 124. Additionally, the cap portion 140 can have arecess 142 of any suitable shape for forming a cooperative interactionwith the raised surface 124, depending on the shape of the raisedsurface 124.

The slot 114 can be located adjacent the raised surface 126 or withinthe raised surface 124. For example, the slot can be at the base of theraised surface so that the slot is on the upper surface 126 of the lidbody 110. In detailed embodiments, the slot is located on a side wall ofthe raised surface 124 and not on the upper surface of the lid body 110.In specific embodiments, as seen in the Figures, the raised surface 124defines a notched area 128 and the slot 114 is located within thenotched area 128.

Referring to FIG. 1, the opening 112 may be surrounded by a raisedperipheral lip 132 extending from the upper surface 126 of the lid body110. The raised peripheral lip 132 extends above the major plane of thefrontward portion 120. The cap portion 140 in these embodiments, asshown in FIG. 4, includes a peripheral channel 144 configured to engagethe raised peripheral lip 132 surrounding the opening 112. As seen inFIG. 1, the raised peripheral lip 132 projects or protrudes upwardlyfrom the upper surface 126 of the lid body 110, and when the cap isplaced in the closed position 118 (as shown in FIG. 3), the cap portion140 also projects beyond the upper surface 126 of the lid body 110.

As shown in FIGS. 4 and 5, the cap portion 140 of one or moreembodiments includes at least a pair of locking tabs 146 and lid body110 includes at least a pair of slits 134 positioned adjacent theopening 112 to accept the locking tabs 146 to lock the cap portion 140in the closed position 118. The locking tabs 146 of specific embodimentshave a bayonet style locking interaction. The slits 134 in the lid body110 can be positioned outside and adjacent the raised peripheral lip132. In detailed embodiment, the locking tabs 146 include radiallyprojecting fins 148 sized to provide an interference fit when slidingthrough the slits 134 into the closed position. When the container isfilled or no longer needed, the cap portion 140 is pulled from theresting position 116 over the opening 112 using a sliding motion andsnapped in place with bayonet tabs (locking tabs 146) fitting into theslits 134 adjacent the opening 112.

The base (waste container) and the lid assembly of one or moreembodiments are molded from thermoplastic materials. In detailedembodiments, the lid assembly 110 and base 200 are separate parts whichcan be permanently attached. As used in this specification and theappended claims, the term “permanently attached” means that the lidassembly cannot be easily removed from the base without specific toolsdesigned for the purpose or without causing damage to either the base orlid assembly. Suitable structures for permanently attaching the lidassembly 110 to the base 200 include, but are not limited to,protrusions 206 on an upper portion of the base 200 which fit intomatching openings 136 in the lid assembly 110.

Reference throughout this specification to “one embodiment,” “certainembodiments,” “one or more embodiments” or “an embodiment” means that aparticular feature, structure, material, or characteristic described inconnection with the embodiment is included in at least one embodiment ofthe invention. Thus, the appearances of the phrases such as “in one ormore embodiments,” “in certain embodiments,” “in one embodiment” or “inan embodiment” in various places throughout this specification are notnecessarily referring to the same embodiment of the invention.Furthermore, the particular features, structures, materials, orcharacteristics may be combined in any suitable manner in one or moreembodiments.

Although the invention herein has been described with reference toparticular embodiments, it is to be understood that these embodimentsare merely illustrative of the principles and applications of thepresent invention. It will be apparent to those skilled in the art thatvarious modifications and variations can be made to the method andapparatus of the present invention without departing from the spirit andscope of the invention. Thus, it is intended that the present inventioninclude modifications and variations that are within the scope of theappended claims and their equivalents.

What is claimed is:
 1. A waste container comprising: a base having abottom wall, a side wall extending upwardly from the bottom wall anddefining a receptacle for receiving medical waste; and a lid assemblyincluding a lid body configured for assembly to the base, the lid bodyincluding a raised surface extending from an upper surface of the lidbody, the lid assembly comprising: a cap portion connected to the lidbody that covers an opening in the lid body, the opening located in aforward portion of the lid body and sized to accept medical waste andrestrict access to prevent individuals from reaching into the wastecontainer through the opening, the raised surface in a rearward portionof the lid body defining a notched area and engaging the cap portionwhen the cap portion is in a resting position. a tether slidablyconnecting the cap portion to the lid body, and a slot located withinthe notched area of the raised surface in the lid body to permitslidable movement of the tether through the slot such the cap can bemoved from the resting position such that the opening is configured forreceiving waste to a closed position such that the cap portion coversthe opening, and the slot is located within the notched area. whereinthe tether engages the slot such that the cap portion is permitted tomove forwardly and rearwardly.
 2. The waste container of claim 1,wherein the cap portion includes a recess configured to engage theraised surface.
 3. The waste container lid assembly of claim 1, whereinthe slot is located adjacent the raised surface.
 4. The waste containerof claim 1, wherein the opening is surrounded by a raised peripheral lipextending from an upper surface of the lid body, and the cap portionincludes a peripheral channel to engage the raised peripheral lip. 5.The waste container of claim 4, wherein the cap portion includes atleast a pair of locking tabs and lid body includes at least a pair ofslits positioned to accept the locking tabs to lock the cap portion in aclosed position.
 6. The waste container of claim 5, wherein the lockingtabs include radially projecting fins sized to provide an interferencefit when sliding through the slits into the closed position and preventremoval of the cap portion from the lid body.
 7. The waste container lidassembly of claim 1, wherein the cap portion and tether are integrallyformed.
 8. The waste container lid assembly of claim 1, wherein theforward portion and the rearward portion are tilted relative to eachother.
 9. The waste container lid assembly of claim 1, wherein the lidassembly is made of a thermoplastic material.
 10. A waste containercomprising: a base having a bottom wall, a side wall extending upwardlyfrom the bottom wall and defining a receptacle for receiving medicalwaste; and a lid assembly including a lid body configured for assemblyto the base, a cap portion connected to the lid body that covers anopening in the lid body, the opening sized to accept medical waste andrestrict access to prevent individuals from reaching into the wastecontainer through the opening, the opening surrounded by a raisedperipheral lip extending from an upper surface of the lid body, and thecap portion includes a peripheral channel to engage the raisedperipheral lip a tether slidably connecting the cap portion to the lidbody, and a slot in the lid body to permit slidable movement of thetether through the slot such the cap can be moved from a restingposition such that the opening is configured for receiving waste to aclosed position such that the cap portion covers the opening, whereinthe cap portion includes at least a pair of locking tabs and lid bodyincludes at least a pair of slits positioned to accept the locking tabsto lock the cap portion in a closed position, and the locking tabsinclude radially projecting fins sized to provide an interference fitwhen sliding through the slits into the closed position and preventremoval of the cap portion from the lid body.